The Math Forum's discussion archives include mathematics and math education-related newsgroups, mailing lists, and Web-based discussions.How to Find Other Mailing Lists and Newsgroups
You can read recent messages and delve into history, find out how to subscribe to a mailing list that interests you, read an MAA Online article on math education discussions, or search all of the discussions.
Here are just a few of the groups you might find interesting:
Math Forum Internet News
For a relatively up-to-date collection of mailing lists, visit Web sites like tile.net or topica.com. Here are a few of the lists you're likely to find in the Science/Mathematics/Education category:
Interactive Mathematics Program.
Discussion group for using technology in teaching mathematics.
...established to facilitate the discussion of teaching mathematics, including conversations about the NCTM Standards.
Science and Mathematics Education Program Discussion List.
Use your newsreader to conduct keyword searches for the topic you're interested in. Or, try searching tile.net. Here are a few math/science/education newsgroups you're likely to come across:
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